// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/wm/core/window_util.h"

#include "base/memory/scoped_ptr.h"
#include "ui/aura/test/aura_test_base.h"
#include "ui/aura/test/test_windows.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_tree_owner.h"

namespace wm {

typedef aura::test::AuraTestBase WindowUtilTest;

// Test if the recreate layers does not recreate layers that have
// already been acquired.
TEST_F(WindowUtilTest, RecreateLayers)
{
    scoped_ptr<aura::Window> window1(
        aura::test::CreateTestWindowWithId(0, NULL));
    scoped_ptr<aura::Window> window11(
        aura::test::CreateTestWindowWithId(1, window1.get()));
    scoped_ptr<aura::Window> window12(
        aura::test::CreateTestWindowWithId(2, window1.get()));

    ASSERT_EQ(2u, window1->layer()->children().size());

    scoped_ptr<ui::Layer> acquired(window11->AcquireLayer());
    EXPECT_TRUE(acquired.get());
    EXPECT_EQ(acquired.get(), window11->layer());

    scoped_ptr<ui::LayerTreeOwner> tree = wm::RecreateLayers(window1.get());

    // The detached layer should not have the layer that has
    // already been detached.
    ASSERT_EQ(1u, tree->root()->children().size());
    // Child layer is new instance.
    EXPECT_NE(window11->layer(), tree->root()->children()[0]);
    EXPECT_NE(window12->layer(), tree->root()->children()[0]);

    // The original window should have both.
    ASSERT_EQ(2u, window1->layer()->children().size());
    EXPECT_EQ(window11->layer(), window1->layer()->children()[0]);
    EXPECT_EQ(window12->layer(), window1->layer()->children()[1]);

    // Delete the window before the acquired layer is deleted.
    window11.reset();
}
} // namespace wm
